I was checking my daughter's investment account recently, and I realized that I'm kind of an idiot.

I'd forgotten that I'd bought a dozen or so shares of Motley Fool Stock Advisor recommendation Quality Systems for her account. I hadn't been tracking the stock or news surrounding the company. I felt like a real idiot until I checked my cost basis and realized that the investment was up more than 220%.

So maybe we idiots have it right.

Warren Buffett: Idiot
Every day, I hear stock jocks gloat and die with each 10% rise or fall in their stock price. But there's a big difference between stock jocks and master investors: Master investors sacrifice short-term gains to build real wealth.

As the head of Berkshire Hathaway, master investor Warren Buffett has said that he expects to "keep permanently our primary holdings." The man has directed Berkshire to an incredible 40-year compounded annual growth rate of 21.9% by doing all his work on the front end -- identifying superior companies -- and then just forgetting about the prospect of selling.

Buffett has never sold a share of Berkshire Hathaway, and he says his performance would have been even better than 21.9% if he'd never sold a single share of any of his investments. That may sound like an idiot's approach, but those aren't an idiot's results.

Shelby Davis: Idiot
Shelby Davis turned $50,000 into a fortune greater than $800 million during a lifetime of saving and investing, landing him on the Forbes list of the richest Americans before his death.

Davis is frequently called a B-list money manager, but there's nothing B-list about his returns. Like Buffett, he bought stocks to hold and said before he died that he, too, would have been better off if he had never sold a single investment.

Tom Gardner: Idiot
Well, not really, since he's the one who found Quality Systems in the first place. And if I'd bought when he first recommended the company and not waited, my investment would be up more than 640% -- significantly more than the paltry 220% my daughter has earned. But Tom recently told me that his biggest investing regrets are the companies he's sold over the years.

Tom's sold 12 positions from his Stock Advisor portfolio: Hypercom, Daktronics, PossisMedical, KenseyNash, Websense, Sanderson Farms, Trex, Regis, and two positions in both Affiliated Managers Group and Whole Foods. Of those, Kensey Nash, Daktronics, Hypercom, Trex, and Whole Foods are significantly higher than the price at which he sold them. In the case of Whole Foods, the 28% gain Tom realized when he sold would be a 112% gain today. Whoops. His Stock Advisor picks are still smoking the market by a wide margin, but you can imagine his regrets on giving up those eventual winners.

The buy-to-hold philosophy really can test your short-term patience. Take Ameritrade, for example. Back at the end of 2002, Ameritrade's stock was getting hammered. The market at large was down, and individual investors burned by the tech meltdown weren't trading at their 1999 levels. If you'd purchased Ameritrade shares at the end of 2000 because you were confident in the underlying business, then held through the rough patch in 2002 and 2003, you'd have nearly doubled your money, and you'd be part-owner of a company that recently acquired one of its competitors.

It can be difficult to hold through the market's vicious ups and downs. Having the patience to do so, however, can be quite rewarding:

Company

Five-Year Returns*

Five-Year Beta

Akamai Technologies (NASDAQ:AKAM)

360%

5.3

TTM Technologies (NASDAQ:TTMI)

51%

3.4

Network Appliance (NASDAQ:NTAP)

155%

3.3

LAM Research (NASDAQ:LRCX)

55%

3.3

XM Satellite Radio (NASDAQ:XMSR)

5%

3.3

BEA Systems (NASDAQ:BEAS)

(56%)

3.1

JDSU (NASDAQ:JDSU)

(77%)

3.0

*Returns are adjusted for splits and dividends. Data provided by Capital IQ.

Find superior companies
As you can see, there can be some danger in the buy-it-and-forget-it approach -- JDSU fell hard when the Internet bubble burst, and it's been unable to recover. Yet even among this group of randomly selected, much-more-volatile-than-average companies, the buy-and-forget approach yielded 11% annualized returns -- or close to the market's historical return. That's because while stocks bounce around, they also tend to go up.

Of course, you're not randomly selecting companies -- or at least you shouldn't be. You're looking to identify and buy superior companies with superior prospects, like Stock Advisor recommendations TTM Technologies and, of course, Quality Systems. These are companies that are worth holding despite volatility, and finding them is where Tom -- not to mention his brother and Fool co-founder, Dave -- help me.

I read about Quality Systems in Stock Advisor -- our newsletter in which Tom and Dave go head-to-head to find the best stocks anywhere -- and the business made sense to me. As Tom wrote, the company's software helps private-practice physicians automate administrative and diagnostic records. Growing industry. Leader in the field. Smart business approach. Yup, makes sense. So I bought a small chunk and forgot it. That blend of magic and ignorance has turned my investment into a thing of beauty.

Tom and Dave are finding companies like that all the time -- since the newsletter's inception in April 2002, David's picks are up 42%, and Tom's are up 65% compared with the S&P's 15% -- and I plan to keep adding them to my daughter's portfolio before letting them slip once again from my consciousness.

To find the companies you might want to buy and forget, give Stock Advisor a whirl for 30 days for free. You'll get two stock recommendations per month and access to all of David and Tom's 70-plus recommendations. As always, the Fool's money-back guarantee stands behind the offer.

As for Quality Systems, I believe I've found a superior company, and my daughter and I will do well to heed the wisdom of Buffett, Davis, and David and Tom Gardner and, in the words of Tony Soprano, just "Fuhgeddaboudit."

This article was originally published on July 22, 2005. It has been updated.

Roger Friedman is the managing editor of Fool newsletters and the author of Nipple Confusion, Uncoordinated Pooping and Spittle: The Life of a Newborn's Father . He (and his daughter) own shares of Quality Systems. Whole Foods is a Stock Advisor recommendation. Akamai and XM Satellite Radio are Rule Breakers recommendations. The Motley Fool isinvestors writing for investors.